RFC: new debug option "--debug=c" which echoes all commands executed

[Bill Cox]

Hi Folks,

I'd like to propose, and implement, a new option that would
help debug a deep Makefile tree by echoing *all* of the commands
that the Makefiles executed, even if the "-s" option or
the .SILENT pseudo-target is coded, or if the command line
begins with an "@" sign.

The option would be spelled "--debug=c" or "--debug=e".

Questions:
Is this a good idea?
Is there any existing way to do this?
How would you spell the option?
Should this option be combined with any other
  debug options?  (I propose not to combine it).